<template>
  <div class="app-container">

    <!--课程预览-->
    <div class="ccInfo">
      <img :src="coursePublish.cover">
      <div class="main">
        <h2>{{ coursePublish.title }}</h2>
        <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ coursePublish.subjectParentTitle }} — {{ coursePublish.subjectTitle }}</span></p>
        <p>课程讲师：{{ coursePublish.teacherName }}</p>
        <h3 class="red">￥{{ coursePublish.price }}</h3>
      </div>
    </div>

    <div style="text-align:center">
      <el-button type="primary" @click="prev()">上一步</el-button>
      <el-button :disabled="publishBtnDisabled" type="primary" @click="publish()">发布课程</el-button>
    </div>
  </div>
</template>

<script>
  import {
    getCoursePublishById,
    publishCourseById
  } from '@/api/course'

  export default {
    data() {
      return {
        publishBtnDisabled: false, // 按钮是否禁用
        coursePublish: {}
      }
    },
    created() {
      if (this.$parent.courseId) {
        this.fetchData()
      }
    },
    methods: {
      // 查询发布信息
      fetchData() {
        getCoursePublishById(this.$parent.courseId).then(response => {
          this.coursePublish = response.data
        })
      },
      // 上一步
      prev() {
        this.$parent.active = 1
      },

      // 下一步
      publish() {
        this.publishBtnDisabled = true
        publishCourseById(this.$parent.courseId).then(response => {
            this.$parent.active = 3
            this.$message.success(response.message)
            // 跳转到课程列表
            this.$router.push({
              path: '/course/list'
            })
        })
      }
    }
  }

</script>

<style>
  .ccInfo {
    background: #f5f5f5;
    padding: 20px;
    overflow: hidden;
    border: 1px dashed #DDD;
    margin-bottom: 40px;
    position: relative;
  }

  .ccInfo img {
    background: #d6d6d6;
    width: 500px;
    height: 278px;
    display: block;
    float: left;
    border: none;
  }

  .ccInfo .main {
    margin-left: 520px;
  }

  .ccInfo .main h2 {
    font-size: 28px;
    margin-bottom: 30px;
    line-height: 1;
    font-weight: normal;
  }

  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }

  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }

  .ccInfo .main h3 {
    left: 540px;
    bottom: 20px;
    line-height: 1;
    font-size: 28px;
    color: #d32f24;
    font-weight: normal;
    position: absolute;
  }
</style>
